On Fri, 27 May 2011 11:50:03 +0800 Bob Liu <lliubbo@xxxxxxxxx> wrote: > remap_pfn_range() does not update vma->end on no mmu arch which will > cause munmap() fail because it can't match the vma. > > eg. fb_mmap() in fbmem.c will call io_remap_pfn_range() which is > remap_pfn_range() on nommu arch, if an address is not page aligned vma->start > will be changed in remap_pfn_range(), but neither size nor vma->end will be > updated. Then munmap(start, len) can't find the vma to free, because it need to > compare (start + len) with vma->end. > Also, I tagged the patch (or its successor) for -stable backporting as the problem appears to be present in 2.6.38 (at least). -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>